Ventilator wheel or fan



(No Model.) 2 Sheets-Sheet 2. E. F. KITTOE.

VENTILATOR WHEEL 0R PAN; l No. 329,052. Patented Oct. 2'7, 1885.

UNITED STATES PATENT Ormea.

EDMUND F. KITTOE, OF CHICAGO, ILLINOIS.

VENTILATOR WHEEL OR FAN.

SPECIFICATION forming part of Letters Patent No. 329,052, dated October 27, 1885.

Application filed June 2, 18784. Serial No. 133,632. (No model.)

170 all zr/wm it 77mg/ concern.'l

Beit known that I, EDMUND F. KrT'roE, residing at Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented a new and useful Improvement in Ventilator Wheels or Fans, of which the following is a full description, reference being had to the accompanying drawings, in which- Figure 1 is a front elevation of the wheel or fan when used as an exhaust; Fig. 2, a rear elevation of the same; Fig. 3, an outline showing the manner of forming and arranging the blades; Fig. 4, a rear elevation showing the back with the discharge-openings contracted; Fig. 5, a vertical section on a smaller scale.

This invention relates to that class of rotary fans for forming or exhausting air in which a current is produced in a direction at right angles to that of the motion of the blades of the fan, the latter being mounted on a rotary shaft and arranged within a suitable casing or air-passage.

The invention consists in the special formation of the blades of the fan and their peculiar arrangement upon a rotary shaft, which will be hereinafter fully described, and then set forth in the claims.

In the drawings, A represents the hub or center; B, the fan or blade portion; C, the opening in which the wheel or fan is located; I), the shaft on which the hub A is mounted; E, boxes supporting the shaft D; F, a bar on which the boxes are secured; G, a brace or support for the bar F. The hub A may be made of solid material, as shown, or it may be made of a band with end pieces, or in any other suitable manner, and its diameter will depend upon thediameter of the wheel-the larger the wheel the greater in diameter the hub--and this hub is to be keyed or otherwise suitably secured to a shaft, D, on which shaft isa pulley-wheel, D', by means of which and a belt, D, or other driving device, the shaft can be revolved to revolve the wheel or fan.

The acting portion of the Wheel or fan B is formed of a series of wings or blades, c, the inner ends, c, of which are bent around and secured in any suitable manner to the hub A, and the bend of the wings or blades a is one which projects their forward or receiving edges, so as to overhang the plane of the hub or center, as shown. The back of the acting portion is formed of a spider, so as to leave a series of openings extending from near the periphery of the hub to the periphery of the circumference of the back, to coincide with the openings between the blades or wings.

The arms b of this spider for a small wheel" 6o may be formed of the same piece of material as the wings or blades, as shown in Fig. .3, the

material being cut out to leave openings, as

shown in said Fig. 3, and the arms b of the spider being secured at their inner ends, b,

in any suitable manner to the hub, while their outer ends, b', form a connection to the wings c, the wings being cut, as shown in Fig. 3, and being bent or curved around, as there shown, to have their inner ends lap on and be 7o secured to the hub.

The spider may be formed of an independ ent piece, as shown in Figs. 4 and `5, in which case the outer ends of the wings are turned down and riveted, or otherwise secured to the rim or wings b of the spider-arms., as shown in Fig. 5, the inner ends ofthe spider-arms being continuous with the center, to which the hub A may be bolted or otherwise secured.

When the spider is formed as shown in 8o Figs. l and 2, a greater area of opening is left' than when the spider is formed as shown in Fig. 4, and if desired the wheel might be formed as shown in Fig. 2, and strips be secured to its rear face to contract the openings, 8 5

the object being to increase or decrease the amount of discharge to suit the capacity of the wheel or the degree of exhaust required.

The Wings or blades being curved, as shown,

it will be seen that their peripheries c at the 9o front edge project beyond the peripheryformed by the rear face, thereby increasing the diameter of the wheel the difference between the circle of the projecting portion c and the circle of the rear, thus increasing largely the capacity of the wheel.

The curvatureV of the wings or blades in the manner shown causes their bent edge to overlap the rear edge of the preceding wing or blade, forming a passage, d., between the reroo spective wings, which passage decreases in size as it extends rearward. The passages d thus formed between the wings or blades extend the entire'distance from the top to the bottom of the wing or blade, diminishing toward the rear, but leaving an unobstructed passage, and one which will receive air for its entire length and discharge the air in the same manner, thus preventing any vacuum around the hub and insuring an increased capacity for discharge.

The curving of the wings or blades, as shown and described, forms buckets by which the wheel can be as readily used for a force-fan as well as an exhaust one, the shape of the buckets being one that will as readily receive and discharge from the rear as from the front, owing to the divergence produced by the manner of bending, and to change the fan from an exhaust to a force all that is necessary to be done is to cross the belt, if a belt is used for driving, or to reverse the driving-power, giving the fan a reverse rotation.

The rear edge of the opening in the back or spider coincides in curvature with the curvature of the blade or wing,- and the rear edge of the blade or Wing is secured, by riveting, braz'ing, or in any other suitable manner, to the rear edge of the opening with which it coincides. The wings or blades, it will be Seemhave a gradual rearwardly-inclined pitch, with their lower ends running parallel and rearwardly to the plane of the circumference of the hub, and their upper end with a rearwardly and inward pitch, producing a wide mouth or opening for the receiving side, which opening contracts gradually toward the delivery side, by which the air caught by the front side will be drawn in for the entire size of the opening, with a free discharge from the top to the bottom, and by giving the receivingedge a curved projection forward of the plane of theforward end of the hub or center, which projection increases gradually in width as it rises from the hub or center to a line in a plane withthe forward end of the hub or center, it will be seen that a greater receiving capacity is provided than if the forward edges of the wing were on a straight diagonal line from the hub to the periphery of the wings.

The diameter for the back or rear face ofthe fan or wheel being smaller than the actual 5o diameter formed by the outer ends of the wings or blades enables the fan to be set in an opening the diameter of which corresponds to the diameter of the rear or back, thus enabling the fan to be placed in position, with the outer ends of the wings or blades beyond the circumference of the opening, thereby increasing the capacity of the wheel or fan.

What I claim as new, and desire to secure by Letters Patent, is- 6o l. The ventilator fan or wheel composed of the hub A and the wings a, the outer edges ot' the wings connected with each other and describing the periphery of the rear face of the wheel in the plane of said face, and the wings being curved, substantially as shown, from said point to the hub, with the longest curve on the receiving-face and the shortest on the rear face of the wheel, the inner ends of the blades being secured to the hub obliquely to the axis 7o thereof, whereby the wings will project beyond thev periphery of the rear face of the wheel, and thereby increase the diameter of the wheel adjacent to such face, substantially Y as described. 7 5

2. The Ventilating fan or wheel composed of the hub A and the wings a, the outer ends of the wings being connected with each other and describing the periphery of the rear face of the wheel in the plane of said face, and the 8o wings being curved from said point to the hub V obliquely to the axis of the hub, and secured to the latter obliquely to its axis, the front edge of one wing overlapping the rear edge of the preceding wing to form a passage, d, from the periphery of the wheel to its hub, decreasing in size from the front to the rear face of the wheel, substantially as described.

EDMUN D F. KITTOE.

Witnesses:

ALBERT H. ADAMS, O. W. BOND. 

